<template>
    <div>
        <Category :scene="scene"></Category>

        <el-card style="margin-top: 20px">
            <div v-show="scene == 0">
                <el-button @click="addAttr" type="primary" size="default" icon="Plus"
                    :disabled="categoryStore.c3Id ? false : true">添加属性</el-button>
                <el-table border style="margin:10px 0px" :data="attrArr">
                    <el-table-column label="序号" type="index" align="center" width="80px"></el-table-column>
                    <el-table-column label="属性名称" width="120px" prop="attrName"></el-table-column>
                    <el-table-column label="属性值名称">
                        <template #="{ row }">
                            <el-tag style="margin:5px" v-for="(item, _index) in row.attrValueList" :key="item.id">{{
                                item.valueName }}</el-tag>
                        </template>
                    </el-table-column>
                    <el-table-column label="操作" width="120px">
                        <!-- row：已有的属性对象 -->
                        <template #="{ row }">
                            <!-- 修改已有属性的按钮 -->
                            <el-button type="primary" size="small" icon="Edit" @click="updateAttr(row)"></el-button>
                            <el-popconfirm :title="`你确定删除${row.attrName}?`" width="200px" @confirm="deleteAttr(row.id)">
                                <template #reference>
                                    <el-button type="primary" size="small" icon="Delete"></el-button>
                                </template>
                            </el-popconfirm>
                        </template>
                    </el-table-column>
                </el-table>
            </div>
            <div v-show="scene == 1">
                <!-- 展示添加属性与修改数据的结构 -->
                <el-form :inline="true">
                    <el-form-item label="属性名称">
                        <el-input placeholder="请你输入属性名称" v-model="attrParams.attrName"></el-input>
                    </el-form-item>
                </el-form>
                <el-button @click="addAttrValue" :disabled="attrParams.attrName ? false : true" type="primary"
                    size="default" icon="Plus">添加属性值</el-button>
                <el-button type="primary" size="default" @click="cancel">取消</el-button>
                <el-table border style="margin:10px 0px" :data="attrParams.attrValueList">
                    <el-table-column label="序号" width="80px" type="index" align="center"></el-table-column>
                    <el-table-column label="属性值名称">
                        <!-- row:即为当前属性值对象 -->
                        <template #="{ row, $index }">
                            <el-input :ref="(vc: any) => inputArr[$index] = vc" v-if="row.flag" @blur="toLook(row, $index)"
                                size="small" placeholder="请你输入属性值名称" v-model="row.valueName"></el-input>
                            <div v-else @click="toEdit(row, $index)">{{ row.valueName }}</div>
                        </template>
                    </el-table-column>
                    <el-table-column label="属性值操作">
                        <template #="{ index }">
                            <el-button type="primary" size="small" icon="Delete"
                                @click="attrParams.attrValueList.splice(index, 1)"></el-button>
                        </template>
                    </el-table-column>
                </el-table>
                <el-button type="primary" size="default" @click="save"
                    :disabled="attrParams.attrValueList.length > 0 ? false : true">保存</el-button>
                <el-button type="primary" size="default" @click="cancel">取消</el-button>
            </div>
        </el-card>
    </div>
</template>

<script setup lang="ts">
import {watch,ref,reactive, nextTick, onBeforeUnmount} from 'vue';
import useCategoryStore from '@/store/modules/category';
import { reqAttr,reqAddOrUpdateAttr, reqRemoveAttr } from '@/api/product/attr/index';
import type { AttrResponseData, Attr, AttrValue} from '@/api/product/attr/type';
import { ElMessage } from 'element-plus';

//定义card组件内容切换变量
let scene = ref<number>(0);//scene=0,显示table,scene=1,展示添加与修改属性结构
//收集新增的属性的数据
let attrParams = reactive<Attr>({
    attrName: "",//新增的属性的名字
    attrValueList: [//新增的属性值数组
    ],
    categoryId: '',//三级分类的ID
    categoryLevel: 3,//代表的是三级分类
})
//准备一个数组:将来存储对应的组件实例el-input
let inputArr = ref<any>([]);
let categoryStore = useCategoryStore();
let attrArr = ref<Attr[]>([])
watch(()=>categoryStore.c3Id,()=>{
    attrArr.value = []
    if(!categoryStore.c3Id) return;
    getAttr()
})
const getAttr = async()=>{
    const {c1Id,c2Id,c3Id} = categoryStore;
    let res:AttrResponseData = await reqAttr(c1Id,c2Id,c3Id);
    attrArr.value = res.data
}

//添加属性按钮的回调
const addAttr = () => {
    //每一次点击的时候,先清空一下数据再收集数据
    Object.assign(attrParams, {
        attrName: "",//新增的属性的名字
        attrValueList: [//新增的属性值数组
        ],
        categoryId: categoryStore.c3Id,//三级分类的ID
        categoryLevel: 3,//代表的是三级分类
    })
    //切换为添加与修改属性的结构
    scene.value = 1;
}
//table表格修改已有属性按钮的回调
const updateAttr = (row: Attr) => {
    //切换为添加与修改属性的结构
    scene.value = 1;
    //将已有的属性对象赋值给attrParams对象即为
    //利用JSON实现深拷贝
    Object.assign(attrParams, JSON.parse(JSON.stringify(row)));
}

const cancel = () => {
    scene.value = 0;
}

//添加属性值按钮的回调
const addAttrValue = () => {
    //点击添加属性值按钮的时候,向数组添加一个属性值对象
    attrParams.attrValueList.push({
        valueName: '',
        flag: true,//控制每一个属性值编辑模式与切换模式的切换
    });
    //获取最后el-input组件聚焦
    nextTick(() => {
        inputArr.value[attrParams.attrValueList.length - 1].focus();
    })

}
//保存按钮的回调
const save = async () => {
    //发请求
    let result: any = await reqAddOrUpdateAttr(attrParams);
    //添加属性|修改已有的属性已经成功
    if (result.code == 200) {
        //切换场景
        scene.value = 0;
        //提示信息
        ElMessage({
            type: 'success',
            message: attrParams.id ? '修改成功' : '添加成功'
        });
        //获取全部已有的属性与属性值
        getAttr();
    } else {
        ElMessage({
            type: 'error',
            message: attrParams.id ? '修改失败' : '添加失败'
        })
    }
}

//属性值表单元素失却焦点事件回调
const toLook = (row: AttrValue, $index: number) => {

    //非法情况判断1
    if (row.valueName.trim() == '') {
        //删除调用对应属性值为空的元素
        attrParams.attrValueList.splice($index, 1);
        //提示信息
        ElMessage({
            type: 'error',
            message: '属性值不能为空'
        })
        return;
    }
    //非法情况2
    let repeat = attrParams.attrValueList.find((item) => {
        //切记把当前失却焦点属性值对象从当前数组扣除判断
        if (item != row) {
            return item.valueName === row.valueName;
        }
    });

    if (repeat) {
        //将重复的属性值从数组当中干掉
        attrParams.attrValueList.splice($index, 1);
        //提示信息
        ElMessage({
            type: 'error',
            message: '属性值不能重复'
        })
        return;
    }
    //相应的属性值对象flag:变为false,展示div
    row.flag = false;
}

//属性值div点击事件
const toEdit = (row: AttrValue, $index: number) => {
    //相应的属性值对象flag:变为true,展示input
    row.flag = true;
    //nextTick:响应式数据发生变化,获取更新的DOM(组件实例)
    nextTick(() => {
        inputArr.value[$index].focus();
    })

}

//删除某一个已有的属性方法回调
const deleteAttr = async (attrId: number) => {

    //发相应的删除已有的属性的请求
    let result: any = await reqRemoveAttr(attrId);
    //删除成功
    if (result.code == 200) {
        ElMessage({
            type: 'success',
            message: '删除成功'
        })
        //获取一次已有的属性与属性值
        getAttr();
    } else {
        ElMessage({
            type: 'error',
            message: '删除失败'
        })
    }
}

//路由组件销毁的时候，把仓库分类相关的数据清空
onBeforeUnmount(() => {
    //清空仓库的数据
    categoryStore.$reset();
})
</script>

<style lang="scss" scoped></style>